A Non-interventional Study to Investigate the Current Situation of Asthma-COPD Overlap Syndrome in Patients Over Age 40 With Persistent Airflow Limitation in China
A Non-interventional Study to Investigate the Current Situation of Asthma-COPD Overlap Syndrome in Patients Over Age 40 With Persistent Airflow Limitation in China
To investigate the distributions of the patients with ACOS, asthma and COPD over age 40 with chronic airflow limitation in China.
Sites must be tier 3 hospitals in China. Investigators will mainly be determined according to the following criteria:
This NIS will collect the data (e.g. medical record, patient or physician-reported data) from about 2000 consecutive outpatients with persistent airflow limitation(post-BD FEV1/FVC<0.7) in about 20 sites in China for one year. Each site will recruit about 50-150 patients successively.
The data will be collected under routine clinical practice. The treatments or examinations will be determined by their treating physicians. The data are expected to reflect the actual situation about ACOS.
The study population will be about 2000 outpatients, men or women, over age 40, with a clinical diagnosis of asthma, COPD or ACOS with persistent airflow limitation（post-BD FEV1/FVC<0.7）in China from Q4,2015 to Q3,2016.
Inclusion Criteria:
Outpatients, age ≥ 40 years Clinically diagnosed as asthma, COPD/chronic bronchitis/emphysema or ACOS at least 12 months With persistent airflow limitation (post-BD FEV1/FVC<0.7) Signed informed consent forms
Exclusion Criteria:
Have been involved in other clinical trial within 3 months Having other respiratory diseases which can influence airflow, such as lung cancer, tuberculosis, pneumonia, bronchiectasis, etc With acute exacerbation Inability to understand the study procedures or inability/reluctance to answer questionnaire judged by the investigator
Chengdou, Sichuan, China